/Engine/Source/Developer/LauncherServices/Public/ILauncherProfile.h
The first parameter is the selected device group (or NULL if the selection was cleared).
typedef TMulticastDelegate_OneParam< void, const [ILauncherDeviceGroupPtr](API\Developer\LauncherServices\ILauncherDeviceGroupPtr) & > FOnLauncherProfileDeployedDeviceGroupChanged